Ω SUPPORTS OPENCART 2.3Ω
If you use product price = 0 with options is not wonderful see in category, search, manufacturer pages, in wishlist, in compare and in all modules : product price 0.
For this problem is fantastic set the product prices with the first option price.
*** added in related products
*** added price without tax
It is a vqmod file and works Mijoshop also.
(***) If you need options with input quantity + update price automatically, you need this extension: SUPER OPTIONS