probably for good reason too since people would just structure their purchases and send multiple amounts for under $200 which add up to the total purchase price. easy to do with bitcoin. taxes evaded.
Not any easier than to do the exact same thing with cash, and in fact, far more difficult since there remains a permanent and immutable record of the fact you have done this. Centralized exchanges and payment processors would very quickly report you even if you tried to do this.
I actually think the limit should be higher, maybe in the region of $1,000, especially over time as bitcoin continues to gain value against the rapid inflation of the dollar. But better to get a low limit passed first and then work on increasing it.