This will be moot once PayPal increases there fees soon.
But I believe transactions under $10, the 30c transaction fee was waived. And with MP, by including sales tax, you have the potential to pay a little more than when it was separate. But the increase for either case shouldn't be enough to break you unless you were already barely breaking even. Or outright losing money and just not aware of it because PayPal's cut and eBay's cut were separate transactions.
$100 sale at 10% sales tax...
PayPal
$110 * 2.9% +30c = $3.49
$100 * 10% (I think that's what it was) = $10
$13.49 under PayPal
MP
$110 * 12.55% + 30c = $14.11
62c fee difference/increase
Hopefully my math is right.
10% sales tax is a bit outside the norm and there are ways to get sales tax lower for the handful of states that don't charge sales tax on shipping, so you separate shipping costs. But over the course of a bunch of sales at 0%, 6%, or even 10% sales tax. The fees should average out to something less than $14.11. But even then, in the above example, if 62c was the difference between making or breaking you. One or two returns would probably be enough to cripple your business prior to MP.
Now I guess some categories saw a fee increase and they removed fee caps. But that hasn't affected me so I can't say what it is like now for them.
Having said that, as I do sell a lot of sub $10 items. It will be nice if the ever do the transaction fee waiver or even just lower the amount to a dime or something. But it's not enough for me to throw in the towel. Or go on continuous rants about how unfair and greedy eBay is. Just gotta adjust and possibly increase your price a little.
