There have been several excellent sales of "pro" type domains outside of the .com extension. Two of recent note (within the last couple months)were mailpro.eu and alphapro.net ($1862 and $1188 respectively).
You have two nice keywords that fit together well (they do sound good which is important). Plus someone is always looking for an "internet pro" of one sort or another so it's generic enough to do something with. There are even a few google ads which is an added bonus.
Contrary to the puzzling comment of '.co a disaster" stated above, .co is growing rapidly and is now mainstream.
North of low $xxx reseller
low $xxxx Enduser
These are just basic markers. In any case, that's a solid name.