Amazon; and watch whether it is the 20% plus efficiency cells & whether or not it is front or back wiring junction box - they all seem to have one years warranty, confirm that with vendor.
Beware the least-expensive panels shipped directly from China - if quality issues arise the expense of returning item(s) could/would be prohibitive. Product being offered with Prime delivery means Amazon has more of a stake in your satisfaction.
Some panels have the option of extending warranty to 4-years for 15-20% of purchase price, mechanical & electrical failure is claimed to be covered.
At the same price point there is a rigid panel with small dimensions - 40"x20-3/4" - the Renogy Eclipse* 100 Watt unit - now that is a deal for the highest tech PV cells which means the smallest possible dimensions.
The days are short and the night is long and the stars go tumbling by.. . ~Airstream~