User to user SMS communication. Does this exist?

I have a been using Drupal for a bit now but I do not have the ability to really code PHP and get into the inner workings of Drupal. I mostly have ideas for websites and try to use Drupal to develop the idea.

I would really like to find someone that can make this happen or maybe help combine modules to get me there.

Basically I have a site that needs to work like this:

User 1 posts an item for sale
User 2 lands on item node and decides to buy item
User 2 clicks button and an SMS is sent to User 1 telling him that User 2 wants to buy their listed item
- Information to send in SMS would be: Node title (shortened if necessary), User 2's user name, and amount User 2 is willing to pay for item
User 1 can reply via SMS and either accept or decline offer. If User 1 accepts offer the site would lock the node and also have to handle rest of communication between the two users. If User 1 declines the offer User 2 can rebid until a price is reached for the item.

There are a few other specs that need to be worked out but they do not matter if I cannot get the site to do this. I apologize if this is the wrong place to post but it didn't seem to fit in the regular forums.

JD