Hello,
There are several things to say :
You want 2 prices that's ok but there is a condition to use one price or another, right?
So, which condition will allow to have one price or another?
The two prices you configured in your product backend (on your screenshot) works with a condition too, here the quantity.
For example, if your user pick one product quantity it's 100 Euro, if he picks three the price is 85 Euro, and this condition will be applied when there will have at least three quantity in the cart.
If your condition are linked with users categories or more especially Joomla Users Group, you can set an automatic discount for each groups, but the price displayed will be only one price, but you can use description to inform about different prices link to your condition.
I can only told you this from what you gave us.
Awaiting news from you.
Regards,