You can check the posting guidlines here:
https://www.mobileread.com/forums/faq...ing_guidelines
They state:
5. Advertising and Promotion
Please feel free to post in our Flea Market section if you want to buy or sell a reading device (or other item relevant to mobile reading) for your personal use only.
If you have something to promote – e.g. a new book, a new reading device, or other item relevant to mobile reading, then you may announce it discreetly, and respond to questions, in a relevant section of the forum. We appreciate informative and concise information about relevant items. Please do not remark on alternative products, not even in general terms, (e.g. “no other product can equal…”). People who abuse these guidelines may be considered as spammers.
From this rule, I don't see a problem, but I am not a moderator