Your old house is worth over $600k now for sure.
Check out your old neighborhoods here on realtor.com or trulia. Its shocking, really. My dad bought his house in the 1960s for $20k and people thought that was too much. Its worth $2m now (on an acre which is kind of rare in LA).
Oh, I know it is. That house appreciated another $100k within a year of us selling it. My family is working on selling my dad's 60s era rental house in San Jose, which he bought for about $25K in 1967. It will probably fetch $650K.
My uber lib brother owns a similar house in the area, and is sitting on several hundred thousand in equity, but he won't cash out and move to greener pastures. He's just welded in place, which is fine by me. I don't need him moving to Texas.