...there will be over payment on the check in which i have to include the shippers money with your money because they have to pick some other items for me....once you you have the payment i want you to deposit the check into your bank and cash it. upon the confirmation of the payment you will deduct your own money and deduct $50 for your running arounds fee, and send the remaining money to the shipper via western union money transfer ...
...you have to follow this instruction so that i can have the trust on you and you should not forget that you are going to send the shippers fund as soon as the check clear in your bank.
I thought she not real in Florida so I did research her names it real person in Florida.
This is certainly a scam. 'She' sends you a check to deposit that looks good but will bounce 3 weeks later. You are supposed to send your own real money via Western Union immediately - before your bank has learned the out-of-state check won't go through. That's the scam.
The scammer doesn't want your lawn tractor, they want your money that they are asking you to send immediately via Western Union. As soon as you mail them your own money you will never hear from them again. Any legitimate buyer would pay the shipper with their own money. You should insist they pay the shipper. I predict they will cancel the purchase and call you bad names, or simply disappear.
If you want to play with 'her' ask if she will accept your personal check instead of a Western Union Money Transfer. (But don't really send one!)
Craigslist pages have a warning to Deal Locally and Never Use Western Union Money Transfers. That is because these scams are so common.
If you decide to go ahead, don't buy that Western Union Money order for at least a month, to give your bank time to hear back from the Florida bank. Banks will often make three attempts to get payment on a check before they notify you there is a problem. When this is out of state that can take a long time, and in the meanwhile they will tell you there is no problem.
You have been scammed. The net step is up to you - send your good money in exchange for a worthless check, or cancel this 'sale' (scam) and sell locally. I would do the second.