Just bought Borderlands 2 and Farcry 3 for 1020 MS points each (£8.99).
Good deals, but I still can't help feeling fucked over when I see other people here saying they only had to spend 800 points or something.
There's no reason why MS point pricing should vary across differet regions. No fucking reason at all.
Of course there is: Demand controls prices.
As for changing regions to buy stuff: Totally possible. For stuff with an IP check just use a proxy/VPN and buy it on Xbox.com. After 3 months change back and download and play it.