GoTo Assist is about the only product I know of off hand that is similar. Looks like they have daily, monthly and yearly prices.

http://www.gotoassist.com/en_US/expPricing.tmpl

If your looking for pure remote desktop access without someone else on the other end, GoToMyPC pricing and info is here:

https://www.gotomypc.com/en_US/pricing.tmpl

I've used GoToMyPC on a trial basis, and it seemed pretty solid. Worked fine with Windows and Mac.