Any recommendations for a solid, representative crappy laptop? $100 xSomething Thinkpad off Ebay? Or is there something more representative of today.
I suggest doing the final test of your your site on:
* A friends old laptop, on their wifi, still logged in as them, and with them clicking the buttons with you watching over their shoulder.
* The same, but a friends old android phone, preferably with 'samsung browser'.