Right. Flood it w/ lighter fluid, and give it a couple of good knocks on the table top. That will usually work wonders, but if it doesn't, perhaps it would be cheaper and better to buy a fully working one w/ a guarantee and sell yours.
People go on and on about lighter fluid being a no no in cameras. I wish these folks could go into the repair shops and see what goes on in there! Anything that fixes the problem is the name of the game, up to and including an open flame and a good sized hammer. Or, as we said in the Alfa Romero shops (where the cars were always valued far more than the most expensive camera) don't force it, get a bigger hammer.
One of my favorite things to do w/ customers that just couldn't keep out of the shops was to rev the engine in their $40,000 Maserati to about 7,000 rpm and dump a cup of water into the carburetor. That really opened their eyes, and did a nifty job of cleaning off the carbon on the top of the pistons and valves. Just don't stand over the engine, as it has a nasty tendency to back fire and shoot blue flame out of the top of the carb. If it was a particularly aggravating car owner I'd sometimes "forget" to point this out. They didn't need those eyebrows anyway, and I definitely didn't need them in my way.