Honestly, it depends on two things.

One, will your subscription come due before they put up the GRC forms. If yes, subscription probably saves you a little scratch. If no, fill out the forms, fax them in 1990-style and let your membership lapse. (If you care about the insert, I'll scan and flip to you.)

Unless, two, you really want to wrap up the gestalt with Heatwave.

I was going to comment but my comment is pretty much the same as Mr. Terrific's.

I'd say if you have the other 4 parts of Heatwave already, as Masochistic as you are about collecting, I'd say stick with it for the 5th piece if needed.

Yeah. Finish the combiner.

Yeah. I suppose I should complete that. It may be worth more as a whole combiner than as miscellaneous parts.

How much is the membership for a year? $50? $90?

Could be worse. US$40 is not nearly so bad as US$69 for Canada (which at an exchange of roughly 1.25 works out to be about $87 per year). I only join because of the savings for Botcon registration.