Re: best scope for the lowest price
What do you consider long range?
What cartridge? What rifle? Target shooting or hunting?
A good way to get started is the Bushnell Elite 3200 10X scope (fixed power), a set of Burris XTR low rings and an EGW 20 MOA base. All together will set you back about 3 bills.
Other good options are the Millet TRS-1, Mueller Tac-2, Falcon menace, Nikon Buckmaster 4.5-14, Vortex Viper series.
All of these can be had for less than 400 for the scope. A set of Burris XTR rings, which are very well made and very robust can be had for 45 - 50 dollars and the EGW base will run about the same.
I will say it now before someone else does: Use the search feature. This question is asked every other day, with pretty much the same responses. Take the whole 1.5 mintues to scroll through the first five pages of the forum and see the answers to your questions.