If Im being picky there are three things Id fix if possible -

1. In Chrome and Firefox, clicking the links on the menu near the top does nothing. It works in IE.

2. In the header, centre the logo, or fill some of the space to the right.

3. In the main section, theres too much space between the heading and the picture.

Id also add a link to your own website if you have one. Youre not allowed to link to pages that offer direct sales or payment solutions, but you can link to pages for things like tech specifications and warranty info  (people can work out to get to the rest of your website from there 😉 ). ebays policy on links etc is HERE.

Other that that I think they look great. Easy to read with all the info needed, and simple.