It depends on the product and your requirement, because suppliers on Alibaba will be factories, professional trading companies, and the second or even third level middlemen. So their prices will be very different, and not easy to tell them just by seeing their web pages.
If you buying different types products for 1 container or less, we can probably offer lower price than non-factory suppliers on Alibaba, with smaller MOQ.
If you buy huge quantity of single item (like whole container of a type of umbrellas), it’s better to find the real factories on Alibaba. Products need high experience in the industry (like car parts), better to buy from professional car parts trading companies on Alibaba.