I was hoping I could purchase a used 928 on Craigslist and use it on the Verizon network (without the contract lol). I know I wouldn't get LTE, but even Verizon's 3g speeds would be great.
You can totally do this. Service should be around $60 depending on data choice with an activation fee. See Verizon's website for off contract terms and conditions.
As far as I know, they only have BYOD for T-Mobile at this minute, unless you get a ATT sim off of eBay.