I am an older guy about your weight and when I looked for a boat two years ago I picked up a used Blade for about your budget.

Downwind there are advantages to the Falcon and Viper when its blowing. I have not moved a Falcon around the beach but I have moved a Viper. Much heavier than the Blade.

I don't think you will find a used Viper in your price range, but there are a couple Blades out there. One in Illinois that needs some work, but could be had for the low end of your budget.