Exhibit 31.3

I, Michael G. Rubin, certify that:

1. I have reviewed this Amendment No. 1 on Form 10-K/A of GSI Commerce, Inc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: April 28, 2006

By:	/s/ Michael G. Rubin
	Michael G. Rubin
	Chief Executive Officer
	(principal executive officer)