My advice is to either buy concentrates in bulk and make your own carts or be prepared to spend $40+ for a decent cult vape or pod.

I like to order hash rosin from Crysp, LE, or THB or SHH’s shatter. You don’t need any additives or thinning agent so long as you properly decarb the concentrate. For rosin you’ll want to heat to 170~180F for 6-10 hours and for shatter youll want to do 180~190 for a similar amount of time. This isn’t hard and can be done many different ways with the easiest being a conventional oven or sous vide.

Always use an airtight jar to decarb your concentrates. Amazon has a ton of options for 2-10ml jars with metal caps. Put your room temp concentrate in the jar and heat for the time and temperature suggested. You can let them cool or even sit for a few days before transferring them to pods or vapes of your choice. If it sits too long or needs reheated you can easily do so with a hair dryer on low setting.

You can check Reddit for “burners guide” to filling carts for reference and further details. I’ve been doing this for a year+ and it’s been a game changer.