If you just plan on using paypal to get money from spreadshirt and then sending that money to your bank account, then either account will work:
http://www.paypal.com/cgi-bin/webscr?cmd=_display-fees-outside
The business/premier accounts offer a bit more options if you plan on doing more accepting of payments/selling.
You can always start out with the personal account and if you find your needs change, you can upgrade that account to a business or premier pretty easily (PayPal will remind you often of how easy it is to switch and why
)
http://www.paypal.com/cgi-bin/webscr?cmd=_display-fees-outside
The business/premier accounts offer a bit more options if you plan on doing more accepting of payments/selling.
You can always start out with the personal account and if you find your needs change, you can upgrade that account to a business or premier pretty easily (PayPal will remind you often of how easy it is to switch and why