Pimsleur isn't cheap, but if you have an Audible subscription you can (could? haven't checked in a while) get them at a steep discount compared to list price (through Pimsleur or any other source). When I bought the Spanish lessons a few years ago, buying the whole set via Audible this way (even considering the subscription cost, and combined with their credits) basically cut the cost in half (I actually did price it out because I nerd out with spreadsheets sometimes, but I don't recall the exact figures anymore).

Also, check your local library. They may have access for you for free.