What's the world coming to? Dude....Keep the cranks, they're not throw-aways. LOL You don't have to buy or use Shimano rings, they just brainwash you into thinking you won't be able to shift anymore or something. There's lots of 130 bcd rings out there. For instance, a set of 39/53 Vuelta rings run about $45.

If you trash your crank and get a new one, what do you do with the old one? Ebay it? You may get a few bucks for it after all the fees, the time and labor to list it, box it and take to a shipper.

But that's just me.