Just my opinion and you know what those are worth but yeah I'd say you're way high. Not that I'm in the market but if I were I'd sure not go over half the price you're asking. Used bases and rings don't sell for much over half of what new ones can be had for and that old scope is likely not worth over $25 if that. However I sure see stuff sell on here every day for what I think are absolutely outrageous prices. I often look at them and say no way anyone will pay that and yet they do.
Saw a used scope that was marked up sell for nearly 80% of new in box price with a warranty just a week or so ago.