I have an 85 spree, and have owned it for about a year now. I drive it every day, just for fun.
Its reliable, more fun than a barrel of monkeys and cheap to run. Its old enough nobody wants to steal it, and kids wave at you and grannies smile at you.
I paid $200. for mine, but it had 7,000 miles on it and it was rough looking.
Since I bought it, I've dismantled it, and painted it, I decided to rebuild the engine, new rings, and bearings on the crank, and seals. While I had it apart, I replace the simple centrifigal clutch.
All in all I spent about $300 more. So now I've got what runs like a new scooter, for $500.
Parts are easy to find and not overly priced. Honda is a good reliable machine and I find easy to work on.
I wouldn't spend much more than $500 though. Even thought the miles are low, you may have to spend some money on it.
The 2 stroke engine on the Spree is probably good for a total of about 7,500 miles before it needs new bearings and rings.
Good Luck !