How many items can I post? Is there a limit?
There is no limit. You are free to list as many items as you have.
If I clicked on BUY IT NOW, in this moment can anybody else also buy same car or not?
The option BUY IT NOW works very simple: You click on the Button BUY IT NOW, the request goes to server and if you are the first person who clicked, it comes to you an Answer like: YOU BOUGHT IT SUCCESSFULLY !!! Now the item is blocked for another person, so another one can't "buy it now"
What is the difference between BUY IT NOW and AUCTION?
If you want to sell your car immediately and for the final price, you choose the BUY IT NOW option. In case you appreciate your car more than it costs, and you want to have more money for it, you choose AUCTION option to begin the auction.
What do you do if you sold your first item but did not understand the bidding process? Can you get out of it?
The bidding process is very simple....you insert the starting price and the reserve price, if the bidders will not achieve your reserve price, the car will be not sold. The item will be sold in case when the higher bid equals or is higher than your reserve price and if the item is sold you can't cancel the transaction!
Can I pay cash not through Paypal service?
Sure you can, it is not obligatory to pay through Paypal. In "My Activities" page on the left side you will find the page "won", there you can see your won items where you can choose how to pay, if you choose "offline payment" you contact to the seller directly.