Find scammer's and malicious websites, if you are not familiarity with searching products. When you find a good business, only check that your size are  available and if the biz collect the fee of delivery.

You may find scammers and malicious websites, if you are not familiar with searching for products. When you find a good store, check whether your size is available and if there is a a cost for shipping.
(OR :   .... if there's a delivery fee.

You may find scammers and malicious websites if you are not familiar with searching for products. 
When you find a good business, be sure to check that your size is available and if there is a cost for shipping.