couldn't find any reviews or complaints about them on internet
- A definite red flag. Never hire a company without any feedback attached to it. Sure, the company might be new and just starting out so the reviews may not be there yet, or the complaints readily found. The absence of a review means you have to look into the background of the company far more than you usually might.
hey were on the top of the website
- That means they paid the search engine for advertising rights and SEO optimization. Again. Never believe everything you read on the internet without trying to find out more about the company first. Remember that everything, even ranking reputation, is for sale except at a few sites such as ES whose mission is to expose such things.
offering pay pal service
- The magic reference. All companies that use PayPal tend to have a sense of reliability for some reason. That means nothing except that you have buyer's protection service for when you eventually get scammed.