The answer to my trick question is...

Four Queens $10

Reasons to collect....
Location: Las Vegas, NV
Denomination: $10
Silver Strike token
Other: limited edition
From the website: a Silver Strike is a prize token housed in a round two-piece hard transparent plastic case that is dispensed from a slot machine in lieu of coins or redeemable tokens.

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If you like this chip what else could you collect that is similar?

You will not have problems finding $10 denomination chips to collect.

Harrah's $10 Bud Ice Penguin set

Reasons to collect....
Location: Atlantic City, NJ
Denomination: $10
Mold: hat & cane
Other: limited edition set, serialized chips

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If you like silver strikes there are hundreds of them to collect. Based on my unscientific observations the most common SS denominations are $10 & $300 but others exist; $20, $40, $200 to name a few. Here are the two $7 tokens I mentioned earlier.

Harrah's Tahoe $7 Silver Strikes

Reasons to collect....
Location: Lake Tahoe, NV
Denomination: $7
Silver Strike tokens
Images of $7 silver strikes are from the www.mogh.com Chip Guide & contributed by Richard Jezeski.

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Thanks for looking, new question tomorrow!
Erik D / R-8053