My 2 cents..... good luck with the scope that you purchase the 10" is a great scope easy to get around.
The collimator when you buy it whatever brand it is ask them at the shop to give a quick demo of its operation in a scope or yours ,as it will be invaluble later on down the track.
If the box is opened it was probably checked by staff prior to selling.
2x Barlow if you really need one at present,personally i have one but i dont use it as I only use 7mm , 14mm , 26mm.
Good luck with your observing and let us know how your getting along....cheers Kev.
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