How to convert your psp 3000 from a higher firmware to a lower firmware?

You CANT get custom firmware on your PSP (3000) yet so either sell on your psp that you currently have and get a psp 1000/2000 and get try put custom firmware on that.
I have answered this before actually...

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your problem is your actual system, the psp-3000 series is equipped with a TA-090 motherboard which as of to date dark alex(who is the leader among psp-modders) has yet to crack
There is no way to do it you will have to return your system and purchase a psp-2000 series or an old phat which i actually recommend
Right as far as I know.

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Some people are plain idiots on youtube and want to mess you up on purpose.
Oh and remember guys running custom firmware isn't illegal, running the games are. =D
depends on where u get rid of it at..if u sell it from your hands probably 150-200 if u trade it in probably about 100 but its hard to find buyers for PSPs now...hope this helped((:
best prob around 50ish.

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the fifa and madden are gonna be out of date.. since the 10s are coming out in about 2-3 months..
I have a PSP, and at least 10 games to go along with it. I have an apple sticker on the back and it is in very good condition, yes it does work. Very good.
I went to Slackers Games and Cds and i would have gotten at least $70 with a charger for my psp 2001
I'd say go to ebay and try your luck there. I'm sure you can scrape at least $100.
Why sell the old PSP? Get a free PSP Go instead.
Probably about $75 for the console, and varied prices for the games.
i want to use my wireless internet on my psp but it does not let me ?? is there any thing i should do ??
How much do you think I would get?

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i went to go sell mines and those bastrds said they would give me $50 for the psp and $5 dollars for 2 games -god of war and -dragonball z (they are cheap!)

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i would recommend you sell it at a swamp meet place they will give you much more they gave me $100 bucks for my psp and $24 for both my games :)