www.natchezss.com has some great deals on some refurbed Nikons. They have the 3-9-40 buckmasters for $140. The buckmasters line is pretty good in relation to your price range.

As much as I have read on natchez and SWFA.com I would not for one second to be afriad to buy a refurbed Nikon.

here is link to scope

http://www.natchezss.com/product.cfm...c=NZ&src=BE538


here is a pro-staff for $100 3-9-40 if you want to spend a little less.
http://www.natchezss.com/product.cfm...c=NZ&src=BE538

Now these obviously arent the best scopes on the market but are pretty good for your price range.