Been waiting for a price drop on this. Was it cheaper on Black Friday? If so, I must have missed it. This is the cheapest I've seen it personally, so I grabbed a copy. Still retails for $40.
https://www.amazon.com/Wipeout-Omega-Collection-PlayStation-4/dp/B06XY6L858/ref=sr_1_1?s=videogames&ie=UTF8&qid=1521283559&sr=1-1&keywords=wipeout+omega
https://www.amazon.com/Wipeout-Omega-Collection-PlayStation-4/dp/B06XY6L858/ref=sr_1_1?s=videogames&ie=UTF8&qid=1521283559&sr=1-1&keywords=wipeout+omega