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.
You need to contact Ruger. You may have a prototype
50-500
Gun shop, Pawn shop, Gun show, for sale ad, on line auctions, estate sale, garage sale, Shotgun News, etc..
20-100 usd
50-500 USD. Ruger has sn data on their website.
100-650 or so depending on specifics
100-1000 USD
250 USD
100-1000 or more depending on the exact specifications
100-1000 USD
100-500 usd
value depends on overall condition of pistol. good condition can average $800 -$1200