Re: Should I get this?
That's actually a good price for a nice looking Korean Wolfie, a USA one will tend to run you a lot more. And, despite my hate for most Ibanez Korean models, I've been VERY happy with my Korean Wolfgang. The feel is nice, the pickups sound pretty good, and everything is very well constructed (which has been my problem with the sub-Asian Ibanez market).
As for how long it will be there, from what I've seen those are going on the regular (non-evilbay) used market for about $600 to $700, so that is a good price.
And the worth of your Squier depends on the model. If it's an Affinity, the you probably won't get that much for it, since you can get them for under $100 on the bay. But, if it's a nicer one, then you might be able to get that much. Do some research and figure out what they are going for in similar condition. As far as pickups, it's hard to tell what people will want. You may actually be better off selling the guitar with the original pups and selling the replacements separately.
That's my $.02, and good luck getting that Wolfie, you'll like it if you do.