We sell wall art. You likely don't look at a painting by your favorite artist and say "This is overpriced. I bet the canvas and paint only cost $10."
Also, Ramble Maps is a business. We have material costs, shipping costs, advertising costs, rent. We accept returns (and pay for return shipping), spend time making maps, answering emails, and writing posts like this.
And finally, can you let me know where you can get those materials? Those prices are far better than what we pay!
Yeah, no disrespect, I understand you're a business. For example, someone with a little bit of knowledge of GIS and some google skills could create an image of GMTED2010 data and upload it to a printing service for around $260 for a 30"x40". Those with access to printers could do it for about 1/2 that with the right sublimation gear or large format inkjets. I was comparing your 30x45 with 30x40 prints I do of my own works. Granted it's not flyover LiDAR, its space art, but still. I'm not your target customer, but I do wish you the best.
Also, Ramble Maps is a business. We have material costs, shipping costs, advertising costs, rent. We accept returns (and pay for return shipping), spend time making maps, answering emails, and writing posts like this.
And finally, can you let me know where you can get those materials? Those prices are far better than what we pay!