how much will rise of the eldrazi booster boxes cost
how much will rise of the eldrazi booster boxes cost
I've seen several online for around $85.
I've also seen cases (6 boxes) for about $500 ($83.33 per box)
Just do a google search or check out ebay.
I personally would use Dog Star Games or Cool Stuff Inc.
Also, prices may go up after release depending on how quickly places sell out. (Price sometimes increases with Demand). I have found that most "local"* stores sell boxes for around $145 . I'm not sure why they mark them up so high, I guess they don't think they need to compete with online stores. "Local"* stores also tend to have a larger overhead (or cost that they have to cover, electricity, rent, etc. for the store) whereas online stores could be running their store out of someones house.
*By "Local" I mean the average city. I have actually called around to various cities in various states to see how much game stores were selling their booster boxes for.