From the normal Shopify cart, customers can request a quote. This will email you all the items requested. It will also create a editable quote in the app admin. From there you can send them back a quote response with pricing discounts and they can accept & checkout. If they aren't ready to checkout they can also comment on the quote which will send you an email.

Mintt Instafeed lets you display Instagram feeds, Reels, shoppable videos, and UGC as galleries. Create product and collection feeds that build social proof and drive sales. Automatically sync your Instagram feeds, auto-tag products, and let customers shop now or add to cart directly from posts. Customize grid or slider layouts, pin or hide Instagram content, and upload your own photos and videos. Fast, responsive, and built to convert. Upload videos to the Shop app to reach new shoppers.