Bad traders

Sorry I should be more clear, the photo of the packaging using wheels as padding isn't how it arrived, there was some polistyren between all the bike bits and the outside of the box, but still expected slot better securing considering international shipping. No tubes wrapped ofcourse, just brick sized bits of polistyren.

You're partly right in saying the other bits were in condition that was stated, the cranks and the seat post.
I don't think I'm blowing this out of proportion being unhappy with the two dents and the other scratching/rub that it arrived with.

I think £150 is more than fair considering, as someone said, the value of the frame is like halved and unsafe to ride on, I couldn't/wouldn't in good conscience sell it on with the defects stated.

I will admit it was a good deal before, if it arrived how the item seemed in photos but now it's definitely not.

I've now been swayed by comments that maybe you didn't sell it to me knowing about these defects and hiding them (likely happening in shipping) like I thought. But what I can't understand is your lack of admission and understanding towards the situation. I have shipped things before, damaged in transit and reimbursed the individuals from a place of guilt and accountability.

Seller won't negotiate a compromise or accept wrongdoing which in my view is bad faith. Let it at least be a reminder for everyone else to get insurance on shipping and make sure that packaging is done properly and pictured before it's send.

This was how it arrived which didn't make me think it was absolutely battered, but made me slightly concerned.

Edit:

I think £150 is more than fair and I'm still being ripped off for the condition of the other items, I'd just rather be less "down" than I am, and I feel like it's a reasonable request... Am I in the wrong here or being unreasonable?