Shopify Merchant merging to all sell on one shopify site

[biggaff]

Is it possible to combine shopify products into one site like an online flea market?

For instance if I have a Shopify store to sell basketballs, is it possible to:
-Bring in their product data for sale on my main site?
-Allow people to create their own boutique product lines onto our website?

Thank you for your help!!!

[dropship_helps]

Do you mean print on-demand boutique?