help with pricing

Looks good to me.

Friend! Are you serious why! add more images of your models and add more features and keep patience, and please minimum price your model deserve 62$ https://www.cgtrader.com/3d-models/military/gun/r4-c-assault-rifle-pbr-game-ready-low-poly Upgrade your skills a little bit more, very nice

I always try to adds some wireframes to renders without texture. People can then get a sense of your modelling which can hopefully turn it into a sale. Also, personally I think some of your renders are a little dark and you can't see the model very clearly. Remember its a shop front and your trying to sell them to a wider audience and they need to see what they are buying. You would think twice about buy something from a dark and dimly lit shop window. Modelling and texturing looks good to me but don't rest on your laurels and keep practicing and improving your skills. Good Luck

Your pricing seems reasonable for your low poly stuff. As much as you may be able to price your models higher, you run the risk of overpricing yourself out of the market. If your M249 weapon models was the only one that existed, you may be able to ask for a higher price, but there are several on this site.

In my honest opinion, your prices are justified and OK.
The only issue is, CGT is a "low price platform".
So if you don´t offer a 1.000.000 asset for under 10 bucks, you won´t be very successfull here.
Look at prices at Turbosquid or Renderhub. Good luck!