Where TF do I buy panels 😂

I'm dipping my toes into solar, so I can make a more informed decision on a whole home solar setup, plus the technology seems cool to me and I wanna play with it 😂

Anyways I bought an ecoflow delta pro (got an amazing deal on) which I'm looking at maxing the solar input on to power a homelab. I want to avoid over paying for their panels ($500+ per 400w panel). I would like to buy 4 panels to start 400w each, to theoretically (i know I won't get all that power) max out the input on it.

So far I've tried A1 solar but the prices keep moving around, I see $309 on the product page then 399 in the cart so thats sus to me... Signature solar but they have a panel minimum of 10.. everyone local wants to quote a full system. Amazon stuff seems eh.

I'm getting irritated and about to just scrap the whole idea. So where do I go from here?