Pretty sure I nailed the 2 guys who got max contracts in the D&D league chat when talking with MoonPygg. One, the WR Barfield, Smirt overpaid greatly for him and nobody else bid close.

The LB Gatlin was a different story.

3 contract offers over $250 million for a guy with 67 speed.
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All of that being said, you HAVE to overpay if you want free agents usually. Most teams have a lot of cap room and quality free agents are rare, so when demand is way higher than supply, the price goes way up.
I paid 2 backup OL $10 million a season and a 65 speed CB nearly $15 million. That's insane, and more than I wanted to pay but had I missed out on them, I'd be back at it looking at much older players. Yes they can be signed for less money but you're still mostly overpaying.