When making a reply or a post - scroll the page down a bit. See where it says Manage Attachments - click on that. Then just follow the prompts When finished DO NOT click on Preview - just click on Reply.
You have use the photo software you have to change the file size. You can do that by compressing file or by cropping the picture. But if you can't figure it out - just email the pic to me and I will post it for you - gdjmsp@qwest.net
As for sending it in to be graded - you certainly could. The pics are a little blurry so it is hard to say for sure but the coin should grade as AU and perhaps Unc. Value could range from $50 - $200 - but the carbon spot is gonna cut down on that some depending on the grade. If it were me - I think I'd pass on the grading.