i know how you feel edd, for me, when prices took a massive jump, i looked elsewhere.
i now have a very nice loose m.a.s.k collection, and an even better real ghostbusters collection.between bits i had already picked up in joblots, trades for spares and a bit of wheeler dealing on double items,they have cost me next to nothing. they each take up an ikea detolf unit in the living room and are providing a real fix to the hobby bug. they are fantastically cheap compared to star wars, although mask is steadily creeping up, and its lovely to pick up big job-lots for 20-30 pounds. they are also more colourful and exciting in a lot of ways, being far more advanced and detailed figures that were being produced at the same time as or just after the star wars line, and all by kenner!
I prefer trading items to buying them, have a loose run, about half the ships/vehicles and all the mini-rigs, spent under £200 and have had a blast doing so. This hobby doesn't have to be about spending a mortgage deposit every month on one item