I don't see what the problem is with this, because it can work in a hobbyists favour.
Revenue Canada's own literature states that " any endeavour with a reasonable expectation of profit can be considered a business"--which means that when you report the income, you also get to make the deductions from business expenses.
That meas you can essentially write off the cost of your collection and collecting purchases as business expenses.
The key things about how Revenue Canada states this ( and you can confirm this with the,--I already have) is that the business need only have a reasonable expectation of profit--something that is very hard to quantify--and CAN show a loss, even over time.
So you do not have to make a bundle, you could make just $1 in profit and its all good.
The thing about going serious/legit with this is that ANYTHING related to your collecting can be written off: display shelves, gas money for hunts, trips to toy shows or conventions, internet use to learn info on new stuff etc. As long as it can be seen as being used toward the "business" its all good.