I search for deals for a living and I've discovered the best space tech deals ahead of Fourth of July celebrations and Amazon Prime Day.

Amazon Prime members can get $1 off per gallon of gas at more than 7,500 BP, Amoco or AMPM gas stations if they link their account to "earnify," a loyalty program by BP, according to Amazon. A webpage promoting the offer states the deal will be valid for one-time use and discount up to 35 gallons on members' next fill-up this weekend.

If you're looking for Amazon Prime Day deals, you'll need an Amazon Prime subscription. Using an Amazon Prime trial is a low-risk method for accessing the bargains while checking out the service's other benefits without being locked into something you may not be ready for.