If you are looking for local buyers in the Moscow area, these specialized businesses often purchase used inventory: Nelikvidanet - Vykup Zapchastey Auto parts store OpenUgreshskaya Ulitsa, 12 строение 2
Known for selling contract engines and performing high-level repairs; they may be interested in rebuildable units. Avtobreyker Used auto parts store OpenSormovskiy Proyezd, 5 стр 3
Beyond local storefronts, you should consider these three types of buyers: Sell Auto Engines and Transmissions: Expert Q&A Guide
Focuses specifically on Japanese engines and automatic transmissions, which is a great niche if your part is from a Japanese make.
Open3-Y Nizhnelikhoborskiy Proyezd, 1А 56.007755, 37.331722
Specializes in the "buyout" of auto parts and allows you to send a list of inventory for a quote. Khodos Avto Engine rebuilding service
A retail and wholesale store that handles a wide range of used car parts. OpenSadovaya-Kudrinskaya Ulitsa, 32
If you have a used engine or transmission to sell, you aren't just limited to the local scrapyard. Depending on the condition and rarity of your parts, different buyers will offer vastly different returns.
