I purchased a nice pair of TF500s locally a while back from the original owner who was combining households and needed space. He even threw in a B&O straight-line tracking TT missing the cartridge. The entire transaction, IIRC, was way less than $100. I have really enjoyed listening to them, though I haven't had them in a regular system in my home because, well, because I have too many speakers already. I just thought I'd try them out.
Periodically I'd search CL and FB Marketplace for Timeframe and they'd pop up all over the place for cheap money. I was watching a pair of TF400s about 5-hours away for some time and saw their price cut in half. They looked good in the lousy photos and a trip this past weekend had me within 40-minutes of this listing, so I contacted the seller, and dropped by on my way home. The owners were giving their house to their kids and building a new one nearby but were currently moving everything into a basement room while living in an RV in the driveway. The TFs were in the room with a cat who had apparently been checking out the socks, but not too bad. They looked big when I first saw them and I had trouble seeing into the socks with a flashlight to check to make sure the rubber surrounds were there and the drivers were original. Something didn't look right, so I looked on the input on the back and it said "TF600". I tried to use that as a negotiation figuring if the original owner didn't know what model he had, he might not know what they were really worth, either. But he'd already cut the price in half over the past weeks and wasn't interested in cutting any more.
I figured the twenty-bucks or so I'd try to knock off was already spent on the gas getting there so I agreed to his price and we put them in the back of the smallest BMW car built within the last several decades . . . with room to spare! Now that I have them home, I have to say these are quite an improvement over the TF500s I've grown to like. They're much more efficient. They have quite a bit more extension into the low end, and the HF is airier and brighter. All things considered, an excellent buy on a fine speaker. Now I have to do Heather's black-paint removal process and make them look as nice as the TF500s. Looks like the later FT600s skimped on the thickness of the wood over the earlier TF500, but the contrast of the black socks and the (soon to be) brown wood top and bottom has to look better than all black. Even the badge logo looks cheaper than that of the TF500. But the sound is what it's all about, and I'm liking these after just a few hours. TF600s for the price of TF400s will work every day!!