I have owned and restored several (see signature below), the electric start thing makes me think these are not Vespas as that was never a feature of Vespas even in the 80s. As Rot pointed out, you also owe it to yourself to do some diligence and make sure these are not “bodge” Vespas. If you can post a pic here I am sure we can tell you with a lot more certainty what you are looking at. Alternatively feel free to DM me, I’m not in the market to buy and will steer you right.
To your questions:
What is a “nice driver” Vespa worth: if complete and genuinely 60s Vespa currently on US soil with paperwork then anywhere from $700 to $15,000. The model makes a huge difference here. My two 70s Vespas are worth about $2k for the Primavera and about $7k for the Rally fwiw.
How easy are they to maintain: very, 2 stroke engine and straightforward design.
Any issues or gorchas: critical not to buy a bodge. For people like me (and I am guessing Rot) I know immediately when I am looking at one but for someone just casually dipping a toe into vintage Vespas a bodge may be less apparent. Notable things to look for would be a square license plate holder, chrome ornamentation especially around the front fender, and floorboards which are not smooth or are covered by nonstock rubber mat.
Poor picture showing some of mine
