Hello Reel Bond and welcome to thecarversite.com. Glad you found us.
As Charlie pointed out, the TFM75 amps are rare and expensive. Personally, I'd say no thanks unless the cash boot was enough to replace the TFM 75.
I did a search of the various auctions and audio listings, and there aren't any TFM 75s listed that I could find. The last few listings I've seen have been in $2K range, but I don't know if they sold or not. Occasionally you will see a listing for $1500.
From what I've read here, the PT2400 is the professional version of the TFM 75. Both amps are discussed here is several threads, and maybe some of the folks with first hand experience will chime in.
I hope that helps.