A pointless question!....
Take for example my 30yr old B&W Matrix801's. Retail in 1990 they were $3500. I bought them used in 1998 for $2200. What does that mean in today's dollars? Who knows. I'd compare them with any speaker available today in the $3-6k range.
Same goes for my 20 year old Bryston amp. Today's Bryson's are twice the price as mine. Over my 35 years in this "hobby?", I'd say my purchases between new & used have been about 50/50. Now there's a worthwhile question to pose to the group. What's you percentage between New & Used gear?