Considering you pretty much can't buy a car tire worth the paper the label is printed on for $50 these days, and the context of the statement, I'd say it's pretty clear he's talking about a $50/tire markup, so that what would have been a $180 tire becomes a $230 tire.
(Sure, there are $50 tires ... if your car takes 155/75R13 tires, and you don't even know what a UTQG rating means, and you're prepared to buy K-Mart's "Our most economical!" house-brand tire, rated 70-B-C, guaranteed to last 12,000 miles or we'll give you $10 off the next one.)
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(Sure, there are $50 tires ... if your car takes 155/75R13 tires, and you don't even know what a UTQG rating means, and you're prepared to buy K-Mart's "Our most economical!" house-brand tire, rated 70-B-C, guaranteed to last 12,000 miles or we'll give you $10 off the next one.)