My compressor is seized up as well. Going to attempt the job myself. Bought a factory compressor (used) off a member for $30 plus shipping ($60 total). Bought some of the locking springs off eBay to replace any ones I mess with when breaking apart the system. Bought a new orifice tube as well off eBay. Doesn't seem TOO hard. The compressor is only held on by three bolts (though one seems like it'll be hard to get to). Disconnect a few AC lines, two electrical connectors, three bolts, pull it out. Flush the lines ($15 for a bottle of the chemical), oil the new compressor then install everything again.
The car hasn't had AC since I got it and I assumed based on what my brother told me (it was his car) it just needed an accumulator. I put a brand new one in and it still didn't work. Turned out the compressor was seized up the whole time. Shouldn't have to replace the accumulator again since the compressor couldn't have cycled possible contaminants through it, correct?