« Reply #1 on: October 23, 2015, 02:25:08 PM »
I think it depends on the brand. Higher end mics like DPA, Neumann and Schoeps hold their value better than other mics, so there probably isn't a single applicable percentage discount from new street price. I usually check the E-Bay sold listings, as well as vendors like Vintage King and the sale boards here and on GS to try and get a sense of the market for a particular mic. If there isn't adequate sales volume for your mics to determine a specific price, you might look at the discount afforded similar high end mics with higher volume sales, like Schoeps, and apply that adjustment.
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Mics: akg c460 (ck61, ck63), c414buls, c568eb; at4049a, 4051a, 4053a, at853; josephson c42; neumann U87, km84i; beyer m130, m160, m500; aea r84; gefell m71, mt711s, m200, m201, um70S; sony c38; schoeps cmc6, CMBI (mk4, mk21, mk41, mk4v); sennheiser mkh30, mkh40, md421, md431, md541; audix m1290
Pres: API, a-designs, pendulum, purple, millennia TD-1 and HV-32P, gt, littlebox, tinybox, usbpre2, CA 9200, pipsqueak, grace V2, DAV BG1
Cables: KCY, CMR, Naiant AKG actives, PFAs, asst. GAKables and Darktrain
Recorders/converters/monitors: dr680, m10, dr-2d, d50, zoom f8 & F8n pro, 788T SSD CL-8, lynx aurora 8, Neumann KH20
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