I've used Priceline directly in the past and had terrible experiences. I tried AutoSlash now and the booking went through Priceline. Only the links in the email from AutoSlash resulted in an error on the Priceline page that opened. It said "We were unable to complete your last request. Try your search again."
So I tried the 'Browse All Vehicles/Locations" link and it said 'We're sorry, the car you chose is no longer available due to changes in pricing or demand. But we've found these other great deals for you.' Those great deals were over $200 more.
I wrote AutoSlash on their website contact form and when I clicked submit it froze and didn't accept my message.
Hi Jason, sincere apologies for the hassle and for our contact form freezing.
I'm having trouble finding your inquiry from the information here (we've had over 100 different inquiries from Jasons in the past 48 hours, so finding yours is a little tough!), but if you can reply to the email quote we sent you or send a message to support@autoslash.com, we can definitely look at your request and see if we can help you book the rate we found for you. Sometimes the rental car companies' systems don't work like they should (trust me, I used to work in IT for one of the rental car companies!), but our support team made up of experienced travel hackers and former rental car employees is usually able to push the right buttons and get things working.
We look forward to hearing back from you and helping you get the best possible rate booked!