I am going to give you my 2 cents for what it is worth. "Buy exactly what you want the first time because in the long run you will waste money trying to get there."
Lets say you " settle " for a scope because as we all have, you buy a sweet ass rig that you just have to go shoot right away. Well crap, you just blew all your funds on this new rifle and have just enough left over to get a "scope". You look under a few rocks in the back yard, grab your stash from the sock drawer and order a scope that will allow you to shoot this sweet rifle. Heck you even have a ton of " spare" rings from all the other times you have done this. One day you get home from work after tracking that package to death and there it is on the porch. The scope has come! Your happy as a clam. You mount the scope careful to get the cross hair lined up just right. You even go as far as trying to bore sight the rifle at home on the dining room table using a light post down the road as reference. It's the big day, you head on down to the range. You Zero the rifle after a few shots. You then turn you elevation knob and the knobs are soft and squishy feeling as they turn, the clicks are not very defined and you say, "man I wish I had bought " dream scope"! (Been there several times over the past 26 years of shooting.) Now your wheels are really turning and over the next couple months of shooting you realize you made a big mistake. You are fed up so you go home and open up the safe to see what you can sell to get the funds for the scope you really wanted( or should have bought in the first place). You post a few items up for sale so you can get the funds to get that dream scope all the while offloading some really nice stuff that you did not want to take a loss on or really, never get rid of cause you did not take the plunge on the purchase the first time. Gotta end... but you get the picture.
I am no rich man by any means so I get it! If you can make it happen, try real hard here , buy what you want first because selling used scopes that are not tier 1 is just a loss of cash and who can afford that?