I like uTablets. I think it has some reseller value, like $50+. I would price it in low $x,xxx region and hope for a sale. On the other hand, I do not think NiceTablets have reseller value. I would price it low-mid $xxx and would not renew. IMHO.
uTablets.com is quite nice - reseller in mid-high $xx (could fetch more on Flippa imo there are some nice reported Tablet related domains lately) and end user in $x,xxx range.
NiceTablets.com - I just don't feel this one low $xx reseller imo.
@Nerever & @FusionSpy Thanks for your valuable input. I am little confused at the moment to sell those or developed into sites because I am seriously looking to develop some ecommerce sites but study the market at the moment.