Denon 2900 - around $150 would be a fair price. One is listed on audiogon for $215 and has been active 11 days and one listed on ebay ended with no buyer with a buy it now price of $165+20 shipping It's an outstanding player, but interest will only be around small circles of DVD-Audio and SACD collectors.
Denon TU-1500RD - Tough to say. One listing on audiogon has been purchased, again you would have to request the final price from the user. One NIB sold for $200 with 12 bids, I personally think it was overbid, but that does happen. Given the unit is new, one person could have really wanted that to match with their other Denon components. Two other listings concluded with no buyer for less than a $100 starting bid, but both were in less than mint condition.
http://www.audiogon.com/cgi-bin/cls.pl?misctunr&1287600786&/Denon-TU-1500RD-am-fm-digital-
I think you could do well to list the Denon PMA-2000ivr and Denon TU-1500RD together and tack on an extra $100-150 on the price. Luckily on audiogon you have the luxary of splitting the items up and making arrangements, something far more difficult on ebay. Ebay has its use, but I don't either of these Denon pieces belong on there. The final value fees are ebay are also much higher than audiogon. Notoriously it's a bad idea to bundle things together, especially on ebay, but it's possible that it could work for those two pieces.
Luxman T-115 - One listing on ebay for this model has a buy it now price of $399+50 shipping. It's been active for 5 days and has had 2 undisclosed offers on it. I would like to think the fair value of that model must be close to the buy it now price because people usually don't send you offers if they feel your pricing is way off, unless they are trying to make a point. Unfortunately I don't have any solid data to support a value of this piece of equipment as the above information can only allow me to make conjectures about its value.
Akai GXC-750D - Ebay has one listing that has been active for 14 days with a buy it now price of $150+35 shipping. It's not in perfect shape. It's had no offers (at least not through the proper channel). Tape decks like these can take a very long time to sell. There are buyers out there for them, but there aren't very many as the technology is not widely used. Akai is better known for their Reel-to-Reel decks. This is a 3 head design, to offload it quickly I'd say you'd be looking at around $60-80, long haul could bring a little over $100 to $150 tops IMO. It's a nice deck, but it doesn't have many controls, and I think only a collector looking to match an entire system would be interested in paying top dollar for this one.
