Great question! When directing people to your About Me page in your eBay listings, you need to be REALLY careful and discreet.
The short answer to your question is no, you can't direct people to your About Me page by saying that you offer discount prices there, since eBay considers that to be soliciting an offsite sale/transaction from your listing, as well as fee circumvention, by trying to drive traffic to your website through your About Me page instead of through selling the item in your listing.
In fact, you can't say anything remotely about people being able to buy products by going to your About Me page, unless you want eBay to pull down both your About Me page as well as all of the offending listings, and slap a pretty unpleasant List Practices violation on your record.
In order to get people to visit your About Me page and thereby find a link to your website, you usually have to get pretty creative. It usually doesn't cut it to just let people know that they should visit your About Me page, or even to tell them to visit your About Me page to find out more about your business. No one really cares about that, unfortunately.
Here are some good "hooks" you can use instead:
"Make sure to visit my About Me page -- you just might find some freebies there!"
"If you'd like 10% off your next eBay purchase from me, you'll need to visit my About Me page to get the coupon code!"
"I'm running a contest this month, where you can win a free ________. If you want a chance to win, you have to visit my About Me page and then email me the secret code listed on there!"
I hope that helps!