What are 750's going for these days? I've had mine for almost 4 years. It took me 2 years to find. It had 19500 miles, very little rust, ran really well and only needed a new tire and rear brake pads to put it on the road. It had some wiring issues, but I worked those out over time. I got mine for 500.00. Have they gone up that much?
If you're not a mechanic, I'd recomend bringing it to someone and have them do the carbs. I'm not a mechanic, and I messed mine up. I brought it to my guy, and in 24 hrs. he cleaned (Ultrasounded) them, put them back together, balanced them and it runs great! Cost me another 200.00, but if I had gone to him in the first place, I would have saved the 80.00 in parts I had bought, and the cleaner, AND a whole weekend with my hands and arms in solvent....I've found that I'm way ahead to pay someone to do the hard stuff (after I figured out what I can't do), and save myself to do the fun stuff!