I don't think that $1000 is to much for a service like this. Having worked with many non technical founders I know about their pain of finding someone who builds a landing page for a reasonable about of money.
I also know quite a few solo founders with a technical background who have pretty shitty landing pages, even though they know (technically) how to build one and/or extended one from themeforest. They just forget about white space, proper padding and stuff, but hesitate to hire a designer for a day.
I wouldn't have an issue paying $1,000 for a landing page, but I do have an issue paying $1,000 for a landing page where the developer only devotes a single day to learning about my business, understanding the problems we're solving, writing copy, designing, and coding.
I'm looking at the before and after example, and there are just a few words changed, previous headlines enlarged and colored, and a call to action at the very bottom. Yes, those are positive changes, but for $1,000 I'm expecting someone to bring far more to the table than a few minor tweaks. If you're asking for a premium price, I'm expecting a premium service.
I also know quite a few solo founders with a technical background who have pretty shitty landing pages, even though they know (technically) how to build one and/or extended one from themeforest. They just forget about white space, proper padding and stuff, but hesitate to hire a designer for a day.