250 USD
You need to contact Ruger. You may have a prototype
50-500
100-650 or so depending on specifics
100-1000 USD
100-1000 or more depending on the exact specifications
100-1000 USD
100-1000 USD or so depending on EXACTLY what you have.
$100-$430 or so, depending on condition. USD - United States Dollars
What do you mean by "street" price? Improving answer: If it's just an average MK1 pistol in decent shape, it should be worth $200 as a shooter / casual target gun / plinker. If it has a really low serial number, some special factory options, or is 30+ years old and comes with the box and original receipt and owner's manual, then it's a collector's item and could be worth twice as much.
Cheap and quality are a contradiction. My suggestion for a REASONABLY priced .22 pistol would be a Ruger Mk III. These are going for about $250 on sale. The Browning Buckmark is another good quality handgun for a reasonable price.
100-500 depending on exactly what "good" translates to when examined.
Ruger's website lists MSRP