1) Would you be willing to trade 5-$1 chips for 1-$5 chip (Assuming all were current issues)

Probably not. Not living anywhere near a casino that uses chips, most of my traders have been purchased, and rarely if ever for face value. I think the same is probably true for a lot of collectors.

2) The table of values I have been using for many years to value trades of uneven denominations for current chips are
$1 Face- $3
$2.50 Face - $4
$5 Face - $7
$25 Face - $28-$30
Are those values unreasonable

No, I don't think so.

3) In the scan below, are there any chips that someone would feel are priced unreasonably when using them as trade values? (By the way, many of them are already traded)

They look reasonable to me, but I don't know squat about the foreign chips.