Whether you receive an inflation adjusted $50k, or a $50k stake in the purchase price of a condo bought in 1992 seem like two different propositions to me. In one case you're talking about what $50k in 1992 is worth today. In the other, you're talking about a share of $400k. I depends on what the offer or agreement was.
Please feel free to contact me if you need any information on homes and prices.