Have your heard the expression......
" if it looks too good to be true, it probably is !"
That is the most dodgy looking of sellers. The web site is, quite frankly a joke. Contact only by email. No address, no phone, items too cheap = scam site. The items listed are favourites of the eBay Scammers and appear regularly.
As for PayPal, yes you are protected to a degree ..... if when you come to pay via PayPal it works ! Often the seller will claim a PayPal issue and ask you to send payment via an unsafe means or your Credit card details with a photo of the card !
Delayed responses to emails are also a warning sign, it can be due to a scammer living in another time zone. 10% extra discount for delayed response seals the case for me. No one can afford to offer another 10% discount on the already crazy prices listed. Walk away.
The only way I would do business with that seller is if I obtained verifiable proof that they are in my country, at an address that I can check, and VAT registered. Payment only by PayPal or in person. If not, they are likely scammers.
Please consider this advice carefully and take care.
Fraser