Good to hear you found a carb for a reasonable price.   Where did you get a new carb for $50.00? 
I said I bought a used carb for $50  all the shops in Toronto were the same price $180  Seems Toro has us by the short one here.  All dealers can only buy direct from Toro so the price was the same. I do know all dealers mark-up is 60%  If I were doing a good volume it would make sense to have a drop off in the US and have some-one re-mail the item to Toronto. Later 
If you are getting paid for what you are doing No matter how much you Enjoy it,   It's a Job