I recently purchased from the BBY Mobile Solutions site, and I must warn you all that they are not the same as buying from Bestbuy Mobile or the store. I have had tremendous difficulty getting my phones and getting them to work properly, using BBY Mobile Solutions. I also signed up for a plan on their site, but when I received my bill, T-Mobile told me the plan I signed-up for was outdated and they would have to charge me for a higher priced plan. BBY MS told me to read the fine print, and they are allowed to have errors on their site.
Just beware who you deal with online! I'm in contact with the FTC now about this, but I wanted to give you all a headsup.