the thing is the P bass' beauty is its simplicity... the ingredients are fairly set, you can upgrade pickups and go for different sounds, or maybe better tuners ... but thats it. the simplisity means I think there's less variation between the sounds you would want, whereas jazz styles are a bit more variable.... so if you have a good P - why would you ever want or need to sell it? Even if you end up playing 6 string fan fret through neck d-tuner 4 pickup piezo equipped filter preamp at you jazz gig/pub - the P will do the P thing better than anything else - you you will keep hold of it....