@redrumloa
I've got one of those! It's nearly perfect (no scratches, yellowing, etc.).
Modifications include: JiffyDos; toggle switch for internal/external drive as device 8; stereo sid. The mods were done by Ray Day (whom you know if you were a "serious" Commodore user).
Add-ons include: CMD RamLink (with 4 megs? -- can't remember); 1 meg 1750 REU (also a Ray Day mod); CMD HardDisk with 52 meg Quantum drive (the HD isn't "perfect" since I got it "used" for $500!).
I've also got lots of other add-ons, etc. (most of which I can't remember right now) -- 1902A monitor, 1581 disk drive, swiftlink, handyscanner, ComputerEyes, etc. etc.)
Also have "boxes" of reference books, manuals, proramming guides, etc. and just about EVERYTHING ever released for GEOS.
I went on a "spending spree" when Commodore stopped making 64/128's because I wasn't sure how long things would still be available.
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The punch line is that now I NEVER use it! The last time it was powered up was to copy off all the partitions on the hard drive for use with Vice.
At that time, it seemed like the 1902A took a longer time than usual to "focus" and I had to "slap" the top of the hard drive to get it to spin up.
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Not sure that I'd sell it, but wanted to take this opportunity to brag (how often do you get to brag about your 128D and have someone know what the heck you're talking about!)
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P.S. The only thing that I don't have is the 20mhz accelerator, since that came "after" I had switched to the Amiga -- kind of wish I had gotten it, though!