Pixpa is not one of the most known portfolio builders out there, but that should change, because it's certainly the one that offers the most bang for the buck.
Even the $5/month starting plan offers 200 images, a custom domain, a commission-free store where you can sell 3 products, proofing, photo editing and much more. There are lots of design options you can tweak and also unlimited pages, including a blog.
For the $8/month plan you get unlimited images, which is really hard to beat.
Ecommerce is available through Paypal or a local indian payment processor (for indian users only)
SEO settings for each portfolio item
Customer support is available 24/7 and the 30 days trial is enough to make up your mind.