Personally I don' think there's a correct answer?
My only piece of advice would be buy something you love,something that moves you like nothing else.If that happens to be £10 great it leaves you £140 to go do it all again but if it's £150 so be it that is equally valid.There's only you will know if the price of your chosen record or records is/are worth it to you??
There's some £10 records I think are priceless to me & there's 4 figure priced records that aren't worth the sleeve they come in........but that's my personal choice.
Good luck in your decision making.
Cheer