There are many ways but the reduction needs to take a risk:
-
https://copay.io/: trusted wallet offer 1:1 bitcoin to Amazon gift cards.
- Purse.io: I didn't use it, but many people recommend it
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@Podgor: contact Podgor using his ANN[1], he offers this service for a while and have a good discount [Use escrow].
You can find a lot of sellers on Bitify.com, but do not expect to find a lot of discounts.
[1]
https://bitcointalk.org/index.php?topic=1789747.0