I'm not sure where Buconero gets his information from, as the 3004 is hard to find these days, and rarely appears for sale. However, my understanding is that it is considered to be comparable in quality and desirability to its successor models, the 3014 and 3014A, which are more commonly found. Those models have recently sold at a well known auction site for prices of $516 (for a "parts unit"), $881 ("play transport not working"), $899 ("excellent condition"), $1135 ("needs new belt"), $1275 ("near mint, serviced"), and $2500 ("with remote; serviced; works flawlessly"). These were actual bids, not asking prices.
I have a 3004 also; great deck!
Regards,
-- Al