Road Bike for £500

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Hi all,

Looking at picking up a road bike for a bit of additional exercise on top of just running.

Is there anything you would recommend in this price range and possibly even lower?
I've seen the Triban from Decathlon gets pretty decent reviews.

Also, I've looked at second hand but not sure if bikes are being valued well by the sellers, for example I've seen a nice looking Cannondale Caad8 for £300. Is that price reasonable for a bike of that age?

Thanks.

 

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Thanks for the Boardman suggestion, I'll try and see what stock is like near me.

Depends on year and groupset (gears) CAAD8 came out in 2012, whats year/spec of the one you have seen?

This is what is listed on the post:
Bike is very good condition with minor scratch/scuff as on photo displayed
Shimano RS 11 rear wheel and maddux R3. 0 front wheel.
Promax and Tiagra brakes Sora shifters, chainset, and derailleurs.
Shimano Spd Pedals Shewalbe marathon plus 700X28 new tyres Cannondale saddle.

I'm not really in the loop with all this stuff so not sure if thats worth the price being asked (Currently £350).