Yeah, no.
How are you trying to get people to shadow? Are you cold calling physician's offices? Try writing short, personal note, explaining that you are a student interested in (physician's specialty) and that you'd be so grateful for the chance to shadow, include your phone number, email, etc. Enclose it in a simple, tasteful greeting card/notecard. Something that will stand out from other, machine generated mail. Hand address and apply an attractive stamp. Send one to every physician you'd like to shadow. If you don't hear from them in a week, then try calling. "Hi, I am following up on the request that I sent to Dr. So and So by mail last week. Would s/he be able to call me back at her/his convenience?
A little old fashioned good manners and professional communication skills will go a lot longer toward getting their attention and desire to help you than anything you could afford to offer to pay.
Also... Do you know anyone who knows a doctor? Could you get a volunteer gig or a part time job that would put you in a place where you could meet some docs?