I feel your pain regarding sentimental "value", however. . . My dad was a high school shop teacher at Waverly High School in Lansing, MI. Some time in the late 1980's he told me that the machine shop was shutting down and all of the equipment was being auctioned off. I ended up winning a Clausing 5418 (12" x 24") lathe for $600. I moved it into my garage and waited for a visit from the 'rents. "Hey dad, I have something to show you in the garage." "Hey, that's the same type of lathe we had at school!" "That's because it is!"
My dad called it "Number 1". He was the department head of the Industrial Arts program when the school was built in 1963. He, the principal and superintendent went to the Atlas/Clausing plant in Kalamazoo, MI on a shopping trip to outfit the shop. This particular 5418 was the first lathe he bought for the school. My dad taught 100's of kids how to turn on that lathe.
That being said, my 5418 is a bear-bones machine as my dad bought the most inexpensive one for the school: screw-on chuck, belt-drive underneath drive that requires getting on your knees to change speeds, no clutch/brake, etc. I really like the feel of my Clausing, and had an emotional attachment to it. However, the lathe is just something my dad bought for the school; no piece of him is in that lathe. (I'm assuming the "dings" in the compound were from students, not him!)
After my parents passed away I looked over his tools and brought home maybe 4 or 5 things. My dad didn't buy Snap On or Craftsman sockets for home use. They were some Chinese knock-off way before Harbor Freight, probably bought at Meijer's Thrifty Acres. I left all of that stuff at their house as our daughter is taking the place and will need something around to turn a bolt. Yes, he probably turned a bolt or two with them at home, but I don't put junk in my tool box even if my dad has used them on occasion.
I still use the 5418, but if a Clausing 5914 with a L00 chuck, clutch/brake, 5C collet closer and taper attachment showed up for reasonable money, the 5418 would be on the chopping block. My dad isn't around to ask, but I could picture him coming out to use the 5418 and griping about having to get on his knees to change speeds. "Bruce, why are hanging onto this old lathe? Get something with variable speed or a gear-head so you don't imbed chips in your knees!"
I really like having two lathes; have a Grizzly G0709 14" x 40" and the Clausing 5418. The G0709 has a set-tru 8" 3-jaw on it (though I have a full set of 5C collets too), and the Clausing has a 5C collet chuck on it. If I'm doing collet work, I head to the Clausing instead of pulling the chuck on the Grizzly. Maybe you can do some creative repositioning of things and shoehorn the 10D in?
Facebook MarketPlace has a plethora of change-gear lathes on it. I can't attach the links, just screen shots. Looks like a range from $550 - $2000 in this area. You should be able to get at least $750-$1000 pretty quickly, a lot depends on the tooling/attachments you have for it.
Bruce