1000/month selling stuff on the internet does not = I sold $1000 worth of stuff on the internet.

so are you asking if he can make $1000/month profit (after associated fees and also paying himself a wage) or just $1000 gross profit?

could it be done sure, but there is a shit ton of hassle that goes with selling on the internet. I've done it and for the first few months me and my friend had ~3000/month in revenue. our margin averaged 25%. after about 6 month we got up to 7500/month in revenue with same margin. we got to a point where we couldn't grow anymore without spending some serious cash. also we were spending 50% of the time addressing various issues with shipping errors, complaints etc. that's 50% of the time we were spending not making money. oh and did i mention we were working 12-14hrs per day M-Sat.

I would imagine it's even more difficult to do it in Canada than in the US where there are a lot more customers.