Micro cut shredders on sale at Amazon:
Price : $29
Amazon.com : Bonsaii DocShred C560-D 6-Sheet Micro-Cut Shredder : Office Products
Bonsaii shredder is equipped with an overheating protection system. The normal duty cycle of this shredder for continuous shredding is 2 minutes before needing a 40-minute cooling down.
Amazon.com: AmazonBasics 6-Sheet High-Security Micro-Cut Paper and Credit Card ...
Amazon.com ' AmazonBasics-6-Sheet-H...
High-security, micro-cut shredder with 6-sheet capacity; destroys credit cards (one at a time); Shreds paper into tiny pieces (5/32 by 15/32 inches); security level P-4; 3 minute continuous run time with 30 minute cool ...