I have quite a bit of time spent working over the Springfield 87 guns...they are practically the same thing. They are good guns when they are in proper repair, but kinda a pain when parts aren't lined up right.
-The new, dirty ammo spits out of every part of these guns
-The loading mechanism is way more complicated than it should be
The two things that I figured out is that 1) there is a clip type spring that has to be installed perfectly and not bent or you will have feeding problems. 2)there is a metal plate that can be bent to adjust the angle of attack when the cartridge leaves the tube and approaches the loading gate.
Don't let this scare you...when they work - they work perfectly for tens of thousands of rounds (practically forever) with NO issues.
If you can try it out first you are golden if it goes though 2 or 3 mags without problems.
To clean it...take the wood and spray the metal off with brake cleaner...then lube and put back together.
They are pretty darn neat guns...they shoot incredibly well and if the price is right I would buy it.