Unbelievable Gwenpool Paris J. Scott Campbell Variant is pre-selling for upwards of $50 on eBay.
IF you are looking to save a few dollars on this one, here is how you can do it.
They can be found here for about $31 ($22 +$9 shipping) they have over 200 in stock. The website is in French but you can easily checkout with PayPal without having to read French.
(If you are feeling uncomfortable, you could always use Google Translate to help figure out what it says.)
DrunkWooky just informed us that Pulp’s Comics is also selling these directly on eBay. They are currently $22.76 plus shipping they can be found here on Pulp's eBay page.
Hastings has a Gwenpool J. Scott Campbell Variant, worth looking at as well.