1997 Sportsman 500 – Complete brake replacement

I have the chance to buy a 1997 Polaris Sportsman 500 for $1K but the catch is that it needs brake work. The guy thinks it needs a new caliper but not 100% sure.

If I were to buy the 4-wheeler and had to replace all brake components, what do you think it would run? I would replace all hoses, calipers, pads and rotors. I know it has a new front brake handle and master cylinder.

It starts and runs (obviously doesn’t stop) but seems to have a hard jerk/jump forward when first giving it throttle. Could that be because it’s sat for a while and maybe just needs a fluid change?

Where is a good place to buy Polaris parts?