I made a two person desk with my co-founder by buying a 8ft long counter top at ikea and 5 metal legs. Looks pretty slick and has held up for a year now.

Ikea countertops (i believe we have numerar) : http://www.ikea.com/us/en/catalog/categories/departments/kit...

Legs (we chose the Vika Byske which were on sale half off): http://www.ikea.com/us/en/search/?query=leg

We sanded the surface and used mineral oil to finish it.

We'd recommend it to anyone looking for a good yet cheap desk!