Simply put, there's no easier method.
Don't bother arguing, measure it. There's no easier method. Period.
It's less typing, less room for mistakes.
If you don't take PayPal, you're saying:
I've been hit by identity theft twice with one credit card ... something that cannot happen with PayPal. (There's a world of expensive difference between knowing my name and credit card number vs. knowing my name and email address!)
Let Me Repeat:
Each new vendor I order from, and use PayPal instead of sending a credit card number, means at least one fewer computer / people who don't get to see my credit card number or checking account number. (With personal checks, they'd also see my home address.) (Sometimes it means many fewer computers/people!)
I can usually send from bank account or credit card, with equal ease.
There's a degree of fraud protection in using PayPal, over and above that of simply sending a check or money order. (PayPal has an arbitration system, which I've never used ... which is better than none at all).
Writing and mailing a check is TIME CONSUMING. It generally takes me about a week to do this. I won't detail the steps, but any programmer should be able to detail them and see the large number and where failure points exist :)
Money orders are even worse, for obvious reasons.
And, please, don't even think of BidPay! That service is (a) SLOW; and (b) EXPENSIVE. It's the payment method of choice when you want to say "screw the customer".
Rightly or not, the world (i.e., the majority of those I've polled) view taking PayPal as a sign of being professional / reliable / stable / trustworthy. Although not my sentiment, I've heard some people say that not having a PayPal account indicates that the person couldn't get a PayPal account, thereby implying a problem of some kind.
The most recent credit-card-over-email transaction I did resulted in the vendor charging my credit card twice (and I'm now trying to get a refund of the second charge) ... something flat-out impossible with PayPal.
I am aware of precisely one legitimate argument against using PayPal:
That's a losing argument, because of a four word reply:
It's that simple. If you are worried that giving out a
bank account number to PayPal can result in fraud/loss,
then simply open a new bank account somewhere and
use that small balance account for PayPal.
Some banks (e.g., Wells Fargo) let you open a small account linked to your main account in a special way: you can move money from/to it, but people with access to that new account number have no access to you main account number (and no knowledge of it, either)! (Sort of like a network DMZ, but for bank accounts.)
Ok? Sign up for PayPal now!
If you haven't signed up yet, re-read the above and then click here.