From Mouser's own HELP page about forms of payment:
Payment Terms
Accepted Currencies
AUD - Australian Dollar
BGN - Bulgarian Lev*
CAD - Canadian Dollar
CHF - Swiss Franc
CZK - Czech Koruna*
DKK - Danish Krone
EUR - Euro
GBP - Pound Sterling
HKD - Hong Kong Dollar
HUF - Hungarian Forint*
IND - Indian Rupee*
ILS - Israeli Shekel*
JPY - Japanese Yen
KRW - Korean Won*
MYR - Malaysian Ringgit*
NOK - Norwegian Krone
NZD - New Zealand Dollar
PHP - Philippine Peso*
PLN - Polish Zloty*
RMB - Renminbi
RON - Romanian Leu*
SEK - Swedish Krona
SGD - Singapore Dollar
THB - Thai Baht*
TWD - New Taiwan Dollar*
USD - US Dollar
ZAR - South African Rand
*BGN, CZK, HUF, IND, ILS, KRW, MYR, PHP, PLN, RON, THB & TWD are only available when paying by AMEX, Visa, MasterCard. More terms are available when ordering in United States Dollar (USD).
Credit Cards
American Express
MasterCard
VISA
Net 30
Net Terms Can be established for businesses, schools and government agencies. Credit limits are dependent upon references and Dun & Bradstreet Ratings. You can obtain a credit application online.
Cash on Delivery
COD is only available from certain carriers within the United States. All COD fees charged by the carrier apply. Not available when shipping via the US Postal Service or using your own freight account number.
Prepaid Wire Transfer/Proforma Invoice
Mouser can accept funds wired to our bank. We will contact you with the total amount which will include shipping charges, applicable taxes and wire transfer fees. We will reserve stock for your order for 10 business days on orders awaiting funds. Orders will be canceled after 15 business days if funds have not been received.
Nowhere does it say anything about Paypal. Also, nowhere is the Paypal logo.