"The link requests that I am most likely to grant go something like this.
Hi Ken;
I own (business name) business in (city/state). We sell (some VERY related product), our website is blahblah.blah
Could we get a link from your site.
Thanks
name
business name
business address
business phone
business email address
If they're site is VERY related, I usually list it. If they want to link back, that's up to them, I don't ask." ken_b