Hi flesh,
Thanks for contributing to our forum. I just posted a variation listing through my own account for which the variations had prices ranging from $3.00 to $10.00 and, when I searched for the item by title on the eBay website, the price was displayed next to the item as $$3.00 to $10.00 as you mentioned seeing.
On the other hand, when I used the Advanced Search tool to search for the items I am selling based on my eBay username, the price was listed as $4.00 next to this item on the ensuing search results page.
I am not quite sure what may be causing your listings to only reflect the price of the most expensive variation on eBay's search results pages, but there does not appear to be anything special you need to do to make this happen aside from offering variations with different prices.
If you are seeing this behavior when you search for your items by title, I recommend contacting eBay's Customer Support team to see if they can explain why you are not seeing the complete price range associated with your variations on the search results page.
I hope this helps. Perhaps another member of our community who has experience this will be able to provide you with some additional information on this topic.
-Mike