First Longboard Purchase

Hi all,
I have been surfing for the past 4 months (3-4 times a week) with a 8'0'' Wavestorm and I've been thinking to "upgrade" to a hard-top long board to up my skills at turning and eventually progress to practicing nose-riding! I'm 32, 5'9'' and 165 lbs and based in SoCal (I mainly surf Doheny, San O, Blackies and Bolsa Chica). First question is: What is the right height and dimensions to be aiming for? I am guessing something like ~ 9' x 23" x 3".
My other goal is to get something second hand so that I don't have to spend too much on a board (something less than $400 would be ideal). It would be really great to get people's opinion on some 2nd hand boards I have found looked around craigslist and Fb (posted below) to see if there is a winner there. Alternatively, I wouldn't spending a bit more for a new board, like a Torq 9'0", if that is a better option!
Any input or other suggestions/feedback/tips would be much appreciated! Thanks!
https://orangecounty.craigslist.org/spo/d/san-clemente-surfboard-longboard-stewart/7157237539.html
https://ventura.craigslist.org/for/d/ventura-surfboard/7157773726.html
https://sandiego.craigslist.org/csd/spo/d/san-diego-ukulele-9-longboard/7153905094.html
https://sandiego.craigslist.org/nsd/spo/d/carlsbad-big-guy-longboard-92-long-23/7153141384.html
https://www.facebook.com/marketplace/item/328539464847532/
https://www.facebook.com/marketplace/item/735389017207101/
https://www.facebook.com/marketplace/item/735389017207101/
I have been surfing for the past 4 months (3-4 times a week) with a 8'0'' Wavestorm and I've been thinking to "upgrade" to a hard-top long board to up my skills at turning and eventually progress to practicing nose-riding! I'm 32, 5'9'' and 165 lbs and based in SoCal (I mainly surf Doheny, San O, Blackies and Bolsa Chica). First question is: What is the right height and dimensions to be aiming for? I am guessing something like ~ 9' x 23" x 3".
My other goal is to get something second hand so that I don't have to spend too much on a board (something less than $400 would be ideal). It would be really great to get people's opinion on some 2nd hand boards I have found looked around craigslist and Fb (posted below) to see if there is a winner there. Alternatively, I wouldn't spending a bit more for a new board, like a Torq 9'0", if that is a better option!
Any input or other suggestions/feedback/tips would be much appreciated! Thanks!
https://orangecounty.craigslist.org/spo/d/san-clemente-surfboard-longboard-stewart/7157237539.html
https://ventura.craigslist.org/for/d/ventura-surfboard/7157773726.html
https://sandiego.craigslist.org/csd/spo/d/san-diego-ukulele-9-longboard/7153905094.html
https://sandiego.craigslist.org/nsd/spo/d/carlsbad-big-guy-longboard-92-long-23/7153141384.html
https://www.facebook.com/marketplace/item/328539464847532/
https://www.facebook.com/marketplace/item/735389017207101/
https://www.facebook.com/marketplace/item/735389017207101/