I look at this and I have to ask myself several questions regarding the design and goals of the site. When I look at a dollar symbol under a review site that quickly translates in my head what the value is.
An issue you might face, to me, is in regards to what the focal points are and if you modify the common occurrence of the dollar sign. For instance the, the 1st point of view should be the images:
the second focal area would be the review ratings:
You could use a similar star rating base but the visitor could have a hard time discerning where the price point shifts too if you used something like a total of 5 stars but only three were defined:
If you're looking to do something around humor you could always do little pigs similar to a piggy bank:
you could also utilize stacking coins:
some might understand the bag of money reference:
To me it just depends how you intend to tie it in the design. You could use a symbol like I mentioned above as a settle note depending on if price is a big focus in your design. You could take the price to the next level and design something just for it like:
There's also color reference such as green for base value, yellow higher and something like red as in high dollar amount applied to coins but usage of this idea could clash with the theme of the site/design.
Site pricing could be designed with the form of payment involved. For instance Bitcoin is growing in usage but you could use their icon for price if the that is what the seller uses as currency:
or modify the PayPal symbols to use your site theme colors:
then there is your site logo as a scale.
Just mentioning my personal preference, visually I see no reason to alter anything from the dollar sign as it's possibly the go to for expressing currency. I think the design's focal point could use that country's currency with something like