Good luck on your buy,
IHP 35 .177 is a very good rifle to go for.
Let me share some of the point that i normally used to look after while buying a gun.
> First try to compare 2 or 3 rifle atleast if possible. even if they are in two diff shops.
> Then try to cock/load and the gun, Notice whether the cocking action is smooth. (Some rifles may have unwanted noise like rubbing of metal while doing so)
> Then while cocking most of the rifles barrel tend to touch the wooden stock this will spoil your bluing so look for that (not a big issue still better to check for it)
> Then the main factor comes into its ACCURACY & CONSISTENCY, Try to shoot some shots (3 or 5) out of the rifle.
Usually .177 will be so accurate. even if your not hitting the bulls-eye look aim for the same place every time, all the shot must land close to each other. If they are close enough then the rifle can be zeroed to get the shot back on bulls eye
If you are an average shooter and if the shots are scattered more than 1& 1/2 at 10 mtrs better to go for another rifle. because .177 at 10mtrs will give out hole in hole shots normally.
> Then look for any cracks on the stock of the rifle (Stock finish / quality), specially on the grip area and on the bottom of the rifle near the cocking slot because these are the areas where the stock will get cracks easily
Believe you instincts (fingers crossed), some rifle may make you feel that this is the rifle made for your choice may be
But I normally do look after these all these while buying a rifle.
if anything is said wrong pardon my pathetic knowledge on rifles.
regards