Plugin to buy unavailable products, paying a percentage (%) of the price

[iwoods]

Me and my team are creating an ecommerce for sale some handicrafts product.
Some of our products will be ready for delivery (will be in stock) and those will be paid by the customer at full price, while others will not be ready (but will still be Able to book them and for these will be paid by the customer at the down payment.

For example:
- Product A -> is WAREHOUSE -> It is on payment at FULL PRICE
- Product B -> NOT WARRANTY ---> It is not at full price but only 70% of TOTAL PRODUCT PRICE

Another exapmle:
Of the "Product A" we have in stock only 1 piece, but at the moment of payment (inside the cart), the situation should be this:
- PRODUCT A -> is WAREHOUSE -> TOTAL PRICE
- PRODUCT A (the second which is not available) -> NOT WARRANTY -> 80% of TOTAL PRICE

You know a Plugin that can provide you recognition options (when purchasing inside the cart) depending on whether or not the products are in stock?

I hope I have explained our needs in a clear way.
Thanks in advance

[iwoods]

Any advice is welcome : )

[shokinro]

why not just create different entry with different price for each product?

[iwoods]

Thank you for your suggestion.
But can you explain more precisely ...

Thanks again

[shokinro]

I am not sure if I understand your question correctly.

Assume you have a product (for example a ipod) with price $100, you can create separated 

 

>- Product A -> is WAREHOUSE -> It is on payment at FULL PRICE

Create a product "ipod(warehouse)" with price $100

 

>- Product B -> NOT WARRANTY ---> It is not at full price but only 70% of TOTAL PRODUCT PRICE

Create another product "ipod(NOT WARRANTY)" with price $70.