Snip Snap

Was climbing ladder and had a miss play, noticed that the echo copy does not get a discount. I think that’s whack, but was still able to win the match. 

How did you discount it? If it was an ongoing effect like Summoning Portal or Corpsewidow then the echoes should be discounted as well. However, it it's a static discount like Galvanizer then it shouldn't affect the echo cost.

See, I didn’t know that...why is that tho?Wouldn’t you think that regardless of static or non static,that echo should copy the card it echoes from?

It's because the Echo copies are technically additional cards you get that disappear from your hand when that turn ends.  So if you play a discounter like Galvanizer, it discounts the Mechs in your hand.  If you then play Snip at 2 mana, the Echo copy is playable at 3 because Galvanizer was not played with that Echo copy in hand.  Same would happen if you played a Glowstone Technician that buffs all minions in hand.  The Echo copy of a buffed minion would have original stats because the Echo copy was not in hand when the buff was played.

Honestly Hearthstone isn't terribly clear and consistent on these things. The way echo works, buffs (+1/+1, mana discounts, etc) aren't copied onto the echoes, those still cast the way they were printed.

*However*, in the new single player adventure, you can buff the stats or reduce the cost of cards in the tavern, and the game treats these altered cards as though they were printed that way. The engine doesn't treat these as buffs, silencing them doesn't shrink them back to normal. So if you reduce the cost of Sn1p-Sn4p to zero using 'Take a chance', then you can cast infinite zero cost snip snaps. If you give it +2/+2 all the echoes will also be 4/5s, etc.

Because that would be broken. If you played two Galvanizer while you have SN1P-SN4P in hand then you'd be able to deal 20 damage from hand at 10 mana, as long as a single mech survives for a turn.

First off, it would be ridiculously overpowered. Magnetic is already a very powerful keyword, almost as strong as charge out of the box. One Galvanizer would let you play this 5 times, and 2 Galvanizers would let you ply it 10 times. Secondly, Echoed cards don't count as carbon copies of that card, they're technically extra cards that are added to your hand. It's essentially like saying "after you cast this, add a copy to your hand that is discarded at the end of your turn". However buffs from the Friendly Encounter don't count as "buffs", they're supposedly bare stat changes. That means that if you give SN1P-SN4P +2/+2 using the Friendly Encounter buff, all Echoed copies would also have the buff. Similarly, if you roll the "change cost to 0" buff on SN1P-SN4P, all Echo copies would cost 0. It works this way because the buffs aren't just "give a minion +2/+2", they're more like "change a minions stats to whatever it's stats are, +2".

This is always how echo has worked.

If you want infinite snips use mechwarper and summoning portal.

The Dalaran Heist buffs get weirder -- in one of my recent runs, I drafted a Doppelgangster and gave it the permanent +2/+2 buff for the run. Based on how a handbuffed Doppelgangster has always worked in live play, I expected to get three 4/4s. Instead, I got a 4/4 and two 2/2s. So for the purposes of the Heist, I'm not willing to trust any "expected" interaction until I've seen with my own eyes how the game treats it (including Echo on Tavern-discounted cards).