dont' get scope bases, with just one screw going through the bottom to attach to the rail; they are too skinny and the teeth on them are not wide enough, to give a good enough friction hold. they will start to ' rail walk' from recoil.
this is a super common problem on mod 60's. make sure the scope bases have two screws through the bottom of them, they will then be twice as wide at the teeth that hold on to the rail.
Best scope for a 100 bucks or less would be either a Tasco varmint series scope, or this is the abosolute best scope under 100 bucks ever; and it is under 50. It is rated to take adult, spring piston, break barrel, air rifle recoil, which is way worse, than rimfire or even centerfire rifles. It also can adjust focus/ parrallax down to about 10 ft. most rimfires are not parralax free, until 100 yds, same with centerfire scopes.
http://www.opticsplanet.net/tasco-3-9x44-titan.html
now this scope comes with rings, but do you see how the bases only have 1 screw going through the bases? that means that the teeth that dig into the rail are not that wide. These could then ' walk ' around on your rail, even though they are pretty wide for single screw. You won't know until you try them , though.
you could do this, and if they start walking , either get 2 screw, wider bases rings, or get Kwik site, tip off blocks, put them on your rail, and then just add the above rings. these are super stable, but will make your scope sit up very high, and you have to adjust your neck/head up higher, to look through the scope. Second row down, middle picture;
http://www.kwiksitecorp.com/
both rifles in the pics of the dudes' above , looks like they are both sitting on the kwik site blocks, see that?
