mcintosh home theater pre-amp tuners.


I have a McIntosh mx132 home theater pre-amp tuner. it's list price was 7k. I see on ebay that many of these, mx130, mx135 and so on doesn't retain their value. is there a reason for this and where doe's mine stand?
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Home theater processors get undercut by the rapid pace of video technology. HDMI interface standards (currently HDMI 2.0 going soon to HDMI 2.1), Dolby standards (e.g. Dolby Atmos), 4K video replacing 1080p -All of these upgrades require new hardware (meaning the stuff you have now is outdated, obsolete). I see fabulous bargains in this area that have been replaced by something new. 
i use my mx132 for 2 chanell use to match my mc602amp. would this be a good match?
Probably. McIntosh "house sound" should come through (generally regarded as excellent). I was going to note, in my previous post, how much value is to be had using an outdated HT processor for two channel (or multi-channel) music offerings.
i don't have home theater. i only listen to music. i wanted a pre-amp tuner to match the appearance of my 602. most of the pre-amp tuners are the older models. so this is why i bought the 132.