The finds

Carbon steel takes a very fine, aggressive edge easily but will develop a patina and requires careful drying to prevent rust. At $153 this Sakai Takayuki trades right around its $164 norm across 9 comparable asks.

Polished stainless steel resists corrosion well and requires minimal upkeep compared to traditional carbon alternatives. The gap runs in the buyer's favor: $68 asked, roughly $103 typical for Seki Magoroku across 10 comparable asks.

Single bevel carbon steel requires careful waterstone alignment on the flat ura side to maintain proper geometry. Sukenari (per the title) at $170 is in line with its market, roughly $187 typical by its researched range.

Used carbon steel requires careful rust prevention and regular oiling despite its patina. The $129 asking sits close to the $120 that Kanetsune typically brings by its researched range.

Carbon steel requires prompt drying after food prep to prevent oxidation and staining on the primary bevel. This Masamoto Sohonten asks $237 where the name's market sits near $317 across 7 comparable asks.

Pitting and rust near the edge require abrasive thinning and flattening to restore proper bevel geometry. $175 lands within the normal $198 range for Masamoto Sohonten (per the title) across 7 comparable asks.

Mono steel blades lack cladding layers, maintaining consistent hardness across the entire cross section as they wear. At $97 this 濃州正宗作 (Noshu Masamune Saku) trades right around its $97 norm across 8 comparable asks.

Honyaki differential hardening creates a rigid single-material blade that demands expert sharpening skill. $531 lands within the normal $554 range for Minamoto Akitada (源昭忠) by its researched range.

A good condition carbon steel blade may show minor patina from prior use but remains structurally sound. This Masamoto Sohonten (per the title) asks $197 where the name's market sits near $318 across 7 comparable asks.

Mono construction means the entire blade consists of a single uniform alloy layer. At $236 this Sukenari trades right around its $219 norm by its researched range.

San-mai carbon construction requires careful drying along the soft iron cladding boundary to prevent red rust. Motokane (本兼) at $175 is in line with its market, roughly $145 typical across 6 comparable asks.

Left-handed san-mai construction requires specific bevel orientation during sharpening to preserve performance. Seki Magoroku generally trades near $98 across 10 comparable asks; this listing wants $70.

Stainless san-mai construction offers corrosion resistance on the outer cladding while simplifying routine maintenance. This Seki Magoroku is priced where its market lives, $108 against a $108 typical across 10 comparable asks.

Mono steel blades lack cladding layers, maintaining consistent hardness across the entire cross section as they wear. The $157 asking runs ahead of the roughly $102 that 濃州正宗作 (Noshu Masamune Saku) normally brings across 8 comparable asks.

Monosteel stainless construction offers straightforward maintenance and high resistance to kitchen moisture. Fairly priced by the name's own market: Seki Magoroku runs about $108 across 10 comparable asks, and this asks $108.

Surface rust and pitting on a carbon san-mai deba require thorough abrasive cleaning to stabilize the steel. $286 lands within the normal $238 range for Masamoto Sohonten across 6 comparable asks.

At $320, this lists above the $128 its own market supports by its researched range.

Stainless san-mai construction combines a stain-resistant exterior with a durable core for easier upkeep. Typical money for Tojiro is closer to $119 by its researched range, which makes $170 a rich ask.

Mint condition mono construction provides a zero wear starting point for regular kitchen maintenance. The seller wants $171 where Seki Magoroku (per the title) typically sees $104 across 10 comparable asks.

Stainless steel construction offers corrosion resistance well-suited for heavy fish butchery without requiring constant wiping. Fairly priced by the name's own market: Seki Magoroku runs about $130 across 10 comparable asks, and this asks $140.

Stainless cladding simplifies routine upkeep on a heavy deba intended for butchery tasks. Sakai Takayuki at $311 sits above its market, roughly $169 typical across 6 comparable asks.

This left-handed single-bevel blade requires specialized sharpening techniques specific to left-hand orientation. Market rate, more or less: $133 asked against the $108 that Seki Magoroku usually sees across 10 comparable asks.

Shirogami white paper steel takes a remarkably toothy, aggressive edge easily on whetstones. Hideo Kitaoka at $200 sits above its market, roughly $121 typical by its researched range.

Typical money for Tadafusa (per the title) is closer to $92 by its researched range, which makes $172 a rich ask.