If you want this PHP Script with Instant Download you can do this on Satoshibox: http://satoshibox.com/xr2wjho6uwr8q67z4c3e3yzhPrice: 0.003 BITCOINATTENTION:
I don't have demo because i don't have time, if you wan't to pay with ESCROW, you can do this Buying in Bitify in the link below (I have Feedback and ESCROW is Obligatory in Bitify) https://bitify.com/auctions/web-development/purchasify-marketplace-digital-products-php-script-919841/WHAT IS PURCHASIFY
With this script you can sell your projects without resellers commission takes half the cost of your project. All profits just for you just need to install the script and add your products.
Or you can setup your own marketplace and accept any user to upload their products and share the link through the social media like Twitter, Facebook, etc..
MULTI-VENDOR
The Multi-Vendor version is like a marketplace, multiple authors can sell their goods like on CodeCanyon. The admin can access to everything and also delete products. You customers/visitors can create a free account and choose between Buyer or Seller.
UNIQUE-VENDOR
The Unique-Vendor version is available for only one seller (the admin most commonly) but your customers can always create an account to have their purchases listed.
FEATURES
Unique-Vendor & Multi-Vendor
Unique-Users
Send an email when Staff remove item
Membership Plan System
Login to download FREE or PAID products
Better download Security based on purchases
User Profile
Related products
Login/Registration system
Easy Share on cocial Media
Embed buttons
Live preview link
Thumbnail / Preview images
Live statistics
Fully customizable
Search items supported
PayPal IPN powered
PayPal payment gateway
Free / Paid products
Featured / Not featured products
Description for each item
List of each purchase for each user
Change password / Edit profile
Multi-currencies support
Custom URL for each product