Once you get two and sell one and get another, than another matching or similar one, sell one get another one etc, they tend to not even notice any more. Especially if they don't ever look at the bank account. EVER. that is how I've been able to pull it off.
Same with attys. since I've gotten a few mods and attys as gifts from those of whom I'm loyal to, it's a no brainer. For one, she no longer even asks or notices (well she did voice that she didn't like my green Odin or green mod (Or my car for that matter) - but that's cool with me, that is just like a "those are the coolest ones I own" stamp of approval to me cause we are very opposite).
Now I just show her the gifts and the others just blend in
