compressor out?
Are you sure that the compressor is out? I got mine converted a couple of years ago from R12 to R134(?). It had a slow leak and it was very expensive to get R12 put in, but I can put the new refrigerant in myself for cheap.
I had my engine rebuilt at 212K because I had used a synthetic blend oil around 180K. That cleaned out the deposits that were keeping the main seals from leaking. After about 20K of the main seals leaking, decided to go for a full overhaul w/ a TRD level 1 cam put in. Have 247K now. If you keep the oil clean and petroleum based, you should be able to go to 250K at least.
I think the KBB trade-in on it is about $400
HTH